Tire Size Question
Thread Starter
Intermediate
Joined: Jul 2008
Posts: 25
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From: Dallas Georgia
Tire Size Question
I bought my Z about 4 months ago and need to replace the tires. I have a set of tires in my garage on Vette rims. The fronts are 245/45/17 and the rears are 285/35/18. If I use these tires to keep saving up for the OEM size, will the Traction system function properly or am I going to get errors?
Thanks for your help!
Thanks for your help!
Drifting
Joined: Jul 2007
Posts: 1,365
Likes: 1,818
The rolling diameter of the 245/45/17 is about 25.7 while the rolling diameter of the 285/35/18 is about 26.0 inches. These numbers are for new tires. Since rears wear faster than do fronts ( I wonder why that is? 
) the differential in rolling diameters is probably less than 0.3 inches on the tires you have. The recommended differential in rolling diameters is about 0.5 inches for new tires so using the tires you have would probably put you on the edge of causing the traction control to start doing its thing. You could turn off the traction control but I do not recommend you do that especially if you would be driving the car in winter condtions.
) the differential in rolling diameters is probably less than 0.3 inches on the tires you have. The recommended differential in rolling diameters is about 0.5 inches for new tires so using the tires you have would probably put you on the edge of causing the traction control to start doing its thing. You could turn off the traction control but I do not recommend you do that especially if you would be driving the car in winter condtions.
